Hi, if anyone could please help i would greatly appreciate it!

Directions: Find a unit vector in the direction of line PQ.

P(7, -4) Q(-3, 2)

the textbook say the answer is: 1/SquareRoot(34) * (-5, 3)

sorry I don't know how to make the square root symbol...

ok, so I know how to find unit vectors for single points. can anyone please explain how to do this one? is it similar to the other method?

Thanks!